Home / 128,615.04-177,370.08-88,257.60

Finding the Fourth Proportional to 128,615.04, 177,370.08 and 88,257.60

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Solution

The fourth proportional to 128,615.04, 177,370.08 and 88,257.60 is: 121,714.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,615.04 : 177,370.08 = 88,257.60 : x
  2. Step 2: Convert to fraction form
    128,615.04/177,370.08 = 88,257.60/x
  3. Step 3: Cross multiply
    128,615.04x = 177,370.08 × 88,257.60
  4. Step 4: Simplify right side
    128,615.04x = 15,654,257,572.61
  5. Step 5: Solve for x
    x = 15,654,257,572.61/128,615.04
  6. Step 6: Final answer
    x = 121,714.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.